bitbake: toaster: missing shutil import

The "buildimport.py" script is missing the "import shutil" line,
which causes a project import page failure.

[YOCTO #12959]

(Bitbake rev: 0bfbcc786fd67bd40153160db7fcd41cd9295234)

Signed-off-by: David Reyna <David.Reyna@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

bitbake/lib/toaster/toastermain/management/commands/buildimport.py

@@ -55,6 +55,7 @@ import os
 import re
 import os.path
 import subprocess
+import shutil
 
 # Toaster variable section delimiters
 TOASTER_PROLOG = '#=== TOASTER_CONFIG_PROLOG ==='